Effect of Flow Velocity on Corrosion Behavior of Typical Metal Materials for Pipes in Seawater

The corrosion behavior of four typical metal materials for pipes was studied in static and dynamic seawater by pipe flow apparatus and electrochemical measurements.The results showed that the corrosion rate of carbon steel in nature seawater was higher than that of 304 stainless steel,B10 alloy and TA2.All of the fluid types of four materials were turbulence in the flow velocities between 3 m/s to 10 m/s.The corrosion behavior of B10 alloy was more sensitive than that of 304 stainless steel in the flow velocity of 10m/s,the main reason was the activation dissolve zone of B10 was wider than 304,which caused protective layer on the surface of B10 formed more slowly than that of 304.TA2 did not corrode in both static and dynamic conditions due to the most dense and stable corrosion product formed on the surface,which was the most excellent material for pipe in seawater.